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PDF TDA7850A Data sheet ( Hoja de datos )

Número de pieza TDA7850A
Descripción 4 x 50 W MOSFET quad bridge power amplifier plus HSD
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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TDA7850A
4 x 50 W MOSFET quad bridge power amplifier plus HSD
Features
High output power capability:
– 4 x 50W/4Ω max.
– 4 x 30W/4Ω @ 14.4V, 1KHz, 10%
– 4 x 80W/2Ω max.
– 4 x 55W/2Ω @ 14.4V, 1KHz, 10%
www.DataSheet4MUO.cSoFmET output power stage
Excellent 2Ω driving capability
Hi-fi class distortion
Low output noise
St-by function
Mute function
Automute at min. supply voltage detection
Low external component count:
– Internally fixed gain (26dB)
– No external compensation
– No bootstrap capacitors
On board 0.35A high side driver
Protections:
Output short circuit to GND, to Vs, across the
load
Very inductive loads
Overrating chip temperature with soft thermal
limiter
Output DC offset detection
Load dump voltage
Fortuitous open gnd
Reversed battery
Flexiwatt27
(vertical)
Flexiwatt27
(horizontal)
ESD
Description
The TDA7850A is a breakthrough MOSFET
technology class AB audio power amplifier in
Flexiwatt27 package designed for high power car
radio. The fully complementary P-Channel/N-
Channel output structure allows a rail to rail
output voltage swing which, combined with high
output current and minimized saturation losses
sets new power references in the car-radio field,
with unparalleled distortion performances.
The TDA7850A integrates a DC offset detector.
Table 1.
Device summary
Order code
TDA7850A
TDA7850AH
Package
Flexiwatt27 (vertical)
Flexiwatt27 (horizontal
Packing
Tube
Tube
October 2007
Rev 1
1/16
www.st.com
1

1 page




TDA7850A pdf
TDA7850A
Block diagram and application circuit
1 Block diagram and application circuit
1.1 Block diagram
Figure 1. Block diagram
Vcc1
ST-BY
MUTE
IN1
0.1μF
www.DataSheet4U.com
IN2
0.1μF
IN3
0.1μF
IN4
0.1μF
AC-GND
0.47μF
SVR
47μF
Vcc2
HSD
TAB
S-GND
470μF
100nF
OFF DET
HSD/OFF DET
OUT1+
OUT1-
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
D03AU1467
1.2
Standard test and application circuit
Figure 2. Standard test and application circuit
ST-BY
MUTE
IN1
R1
10K
R2
47K
C1
0.1μF
IN2
C2 0.1μF
IN3
C3 0.1μF
IN4
C4 0.1μF
C8
0.1μF
5
C9
1μF
23
C10
1μF
12
C7
2200μF
Vcc1-2 Vcc3-4
7 21
10
9
8
6
3
4
13 18
19
20
16
S-GND
15
14
17
C5
0.47μF
22
25
24
2
11 26 1, 27
SVR
C6
47μF
HSD/OFF DET
TAB
OFF DET
D03AU1469
OUT1
OUT2
OUT3
OUT4
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5 Page





TDA7850A arduino
TDA7850A
Electrical specifications
Figure 14. Power dissipation & efficiency vs. Figure 15. Power dissipation & efficiency vs.
output power (RL = 4Ω, SINE)
output power (RL = 2Ω, SINE)
90 Ptot (W)
80 VS = 14.4 V
RL = 4 x 4Ω
70 f = 1 KHz SINE
60
η (%)
90
η
80
70
60
Ptot (W)
180
160 VS = 14.4 V
140
RL = 4 x 2Ω
f = 1 KHz SINE
120
η (%)
90
80
η
70
60
50
50 100
50
40
40 80
Ptot
Ptot 40
30
30 60
30
20
20 40
20
10
10 20
10
00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
00
0 5 10 15 20 25 30 35 40 45 50 55
www.DataSheet4U.com
Figure 16.
Po (W)
AC00074
Power dissipation vs. output power Figure 17.
(RL = 4Ω, audio program simulation)
Po (W)
AC00075
Power dissipation vs. output power
(RL = 2Ω, audio program simulation)
30 Ptot (W)
VS = 13.2 V
25
RL = 4 x 4Ω
GAUSSIAN NOISE
20
15
10
5
012
CLIP START
3
Po (W)
4
60 Ptot (W)
55 VS = 13.2 V
50 RL = 4 x 2Ω
GAUSSIAN NOISE
45
40
35
30
25
20
15
10
5
5 60
2
AC00076
CLIP START
4
Po (W)
6
8 10
AC00077
Figure 18. ITU R-ARM frequency response,
weighting filter for transient pop
Output attenuation (dB)
10
0
-10
-20
-30
-40
-50
10
100
1000
Hz
10000
100000
AC00343
11/16

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